diff --git a/Cargo.toml b/Cargo.toml
index 5402d2a..15a0640 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,10 +28,10 @@ default-features = false
 
 [dependencies.rand]
 optional = true
-version = "^0.3"
+version = "^0.4"
 
 [dependencies.digest]
-version = "^0.6"
+version = "^0.7"
 
 [dependencies.generic-array]
 # same version that digest depends on
@@ -42,12 +42,12 @@ version = "^1.0"
 optional = true
 
 [dependencies.sha2]
-version = "^0.6"
+version = "^0.7"
 optional = true
 
 [dev-dependencies]
-hex = "0.2"
-sha2 = "^0.6"
+hex = "^0.3"
+sha2 = "^0.7"
 bincode = "^0.9"
 
 [features]